Design of Controller for Ignition Temperature Flameless Catalytic Burners

Abstract

According to the requirements of the high temperature flameless catalytic combustion burner ignition and intelligent control, the author designed intelligent electronic igniter with microprocessor controlled. Intelligent electronic igniter is controlled by Freescale MC9S08GB60A microcontroller chip and the thermocouple is used as a temperature sensor. It also combined with high-voltage ignition circuit and the solenoid valve control circuit to achieve real-time temperature monitoring of high temperature flameless catalytic burner control ignition, flame cut off valve and other intelligent control.

Experimental and Numerical Research on Utilizing Modified Silty Clay and Extruded Polystyrene (XPS) Board as the Subgrade Thermal Insulation Layer in a Seasonally Frozen Region, Northeast China

“…For Equations (4) and (5), in the literature [15], each of C s , C l , C i and λ s , λ l , λ i was set to a fixed value, and thus, the variations on C(θ) and λ(θ) were determined by the changes of θ s , θ l and θ i . In fact, the specific heat capacity and thermal conductivity of solid, water, and ice were influenced by temperature [31][32][33][34].…”

“…The subgrade established in a seasonally frozen region must undergo freeze-thaw (F-T) cycles. In seasonally frozen regions, frost heaving and thawing subsidence, which lead to negative effects on the performance of subgrade across the lifecycle, are common mechanisms of subgrade damage in the F-T cycles [2,3]; further, the subgrade damage causes pavement damage diseases such as longitudinal and transverse cracks, dislocation of cement pavement slabs, breaking in the corner of pavement slabs, and uneven settlement of the pavement slab, and so on [4,5]. Engineering research on seasonally-frozen soil subgrade of F-T cycles on the specific heat capacity and thermal conductivity of the MC, XPS board, and SC, 2) show that for MC, XPS board and SC, the improved calculation functions of specific heat capacity and thermal conductivity, considering the effects of F-T cycles, are established, 3) show that, by the numerical method of coupling moisture-temperature calculation, which considers the effect of F-T cycles on the specific heat capacity and thermal conductivity of the MC, XPS board, and SC, the thermal insulation performance, which utilizes the MC and XPS board as the subgrade thermal insulation layer, was identified.…”